On Tue, Dec 23, 2014 at 10:46 AM, Dominic Steinitz <dominic@steinitz.org> wrote:
To restate the problem: this is from code that has not been changed for 2 years. I get
> Examples.hs:42:42: Parse error in pattern: con
> Failed, modules loaded: none.
I think I see the problem. Are you by any chance on a machine which has clang as its default C compiler (OS X, FreeBSD 9.3?/10.x/STABLE/CURRENT, possibly others)? cpp will in that case malfunction because it won't substitute macro parameters after the single quote: